package com.example.win.android_banduyujia.peopleactivity.ui.polites;


/**
 * Created by Win on 2015/9/18.
 */
public class FlingAnimation implements Animation {

    private float velocityX;
    private float velocityY;

    private float factor = 0.95f;

    private float threshold = 10;

    private FlingAnimationListener listener;

    @Override
    public boolean update(GestureImageView view, long time) {
        float seconds = (float) time / 1000.0f;

        float dx = velocityX * seconds;
        float dy = velocityY * seconds;

        velocityX *= factor;
        velocityY *= factor;

        boolean active = (Math.abs(velocityX) > threshold && Math.abs(velocityY) > threshold);

        if(listener != null) {
            listener.onMove(dx, dy);

            if(!active) {
                listener.onComplete();
            }
        }

        return active;
    }

    public void setVelocityX(float velocityX) {
        this.velocityX = velocityX;
    }

    public void setVelocityY(float velocityY) {
        this.velocityY = velocityY;
    }

    public void setFactor(float factor) {
        this.factor = factor;
    }

    public void setListener(FlingAnimationListener listener) {
        this.listener = listener;
    }
}